Circuit maker and breaker



March 31, 1931. L D MABEY 1,798,848

CIRCUIT MAKER AND BREAKER Filed May 10, 1929 2 Sheets-Sheet l 5 62 05 flJL fabey,

INVENTOR ATTORNEY March 31, 1931. 11 MABEY 1,798,848

CIRCUIT MAKER AND BREAKER Filed May 10, 1929 2 Sheets-Sheet 2 lNV NTOR ATTORNEY patented Mar. 31, 1931 UNITED STATES LEROY D. MAIBEY, OF GLOVERSVILLE, NEW YORK CIRCUIT MAKER AND BREAKER Application filed May 10, 1929. Serial No. 362,035.

This invention relates to means for preventing injury to parts of a starter device for a motor from the back lash of the motor, the general object of the invention being to provide automatic means for preventing the starter from being operated until the spark lever is moved to retarded position.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure l is an end view of a starter motor, showing the invention applied thereto.

Figure 2 is a side view of Figure 1.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a section on line 4-4t of Figure 3.

In these views, the numeral 1 indicates the casing of the starter, 2 indicates the armature thereof and 3 indicates the brush carrying arms. A pair of shafts 5 pass through one end of the casing and cams 6 are placed on the inner ends of these shafts and engage the a ms of the ground brushes of the motor. The outer ends of the shafts are cranked, as shown at 7, and these cranks are connected by the links 8 with the arms 9 on a sleeve 10 rotatably mounted on a stub shaft 11 carried by the central part of the end of the casing. An arm 12 is fastened to the sleeve and an adjustable rod 13 connects this arm with the spark control.

The parts are so arranged that when the spark control is in advanced position, the rod 13 will be so moved that it will rock the sleeve and cause the links to rock the shafts 5 so as to cause the cams 6 to move the arms 3 which carry the ground brushes outwardly to move said brushes out of engagement with the armature. Thus it will be impossible to start the motor of the starter until the spark control has been moved to retarded position.

This movement will actuate the parts so that the cams will permit the ground brushes to engage the armature.

Thus this invention will prevent the starter from operating until the spark has been retarded so that there is no danger of any of the parts being damaged through back lash of the main motor, due to the motor being started on an advanced spark. By making the rod 13 adjustable, the parts can be set to make the device operate on a partially retail'ded spark or on a wholly retarded spar r.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

t is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is A device of the character described including a starting motor having a commutato'r engaged by pivotally mounted brushes, shafts journalled to the motor, cams secured to the shafts for engagement with certain of the brushes to engage and disengage the latter with the commutator by the rotation of the shafts, cranks formed on the shafts and extending in opposite directions, oppositely extending links pivoted to the cranks, an arm journall-ed intermediate the ends thereof to the motor and having the links pivoted to the ends thereof, a second arm formed on the journal of the first arm and disposed angularly to the first arm, and an operating rod connected to said second arm operable to start and stop said motor.

In testimony whereof I affix my signature.

' LEROY D. MABEY. 

